Improved elastic stud or button



NTTED STATES! PATENT OEEicE.

A. EniAEns., or cosmos. MAssAoHu'sET'rs. f

vlMPFtVQED ELASTIO STUD OR BUTTON.

Specification forming part of Letters Patent No. 43,762,ldated August 9, 1864.

my invention may be distinguished from allv others of a similar class, together with such parts as I claim and desire .to have secured to ine-by Letters Patent.

In and upon various articlessuch as chairlegs, canes, crutches, the edges ot'doors vand windows, te-elastic studs or thimbles, made of rubber, gutta-percha, 'and other similar materials, have been' used to prevent noise, slipping, and for various other purposes. They have also been applied to lead-pencils for erasers, In the use of these elastic studs or sockets great difficulty has been experienced in retaining them in or upon the articles4 to which they were applied, and the object --of the present invention is to so construct-'them as to cause them when once attached to bind and hold themselves securely in their 'proper positions. ln cases where the elastic protector is to he applied 'to the outside of vthe article-such as- ,chair-legs, crutches &c.-I form a hollow socket of rubber or gutta-percha, having a projecting rim or shoulder on its inside periphery that will fit into a suitable groove on the outside of the article to which it is applied. When the elasticlprote'ctor is to -be inserted in holes or grooves of unvarying diameter, I form it of a conical, wedge, or

other shape, in which one end is larger-than the other, so that when sprung into the said straight holes or grooves the binding force exerted by its hase will prevent its being easily disengaged or drawn outjtherefrom. I also construct an elastic stud or button especially adapted to holes or grooves which are undercut-that is, those which are formed with a shoulder inside. I effect this by making an elastic stud or button with a' projecting hase, so as to form a lip, which, when the stud or4 button is sprungin, will bear against the shoulder in the groove or aperture.

In the accompanying drawings, Figure 1 shows my improved protector applied to a chair-leg; Fig. 2, 'as inserted in an undercut groove, and Fig. 3 as inserted in a straight aperture.

In Fig. l a, a. represent a hollow shell of iubber having a projection or shoulder, b b, on its inside, so formed that when the said shell is sprung upon the chair-leg c it will lit into agroove or depression formed therein for the purpose, vand thus hold the elastic protector securely' in its place. v

In Fig. 2, d e represent a stud or button,

of rubber or gutta-percha, having its base e larger than its upper portion, d, and so formed as to make a lip, f, which, when the stud or buttonV is sprung into an undercut groove, g,

`will bear against a shoulder, h, as will readily -be understood. f

v In Fig. `3, i i is a stud .or button, whose base is larger than its -upper portion,so when .forced into a straight hole in apperture k k ATE. ELIAERS. 

